Silencing Buzzer / Alarm Relay Output Alarm Signals • 19
14 Alarm Signals
14.1.Silencing Buzzer /
Alarm Relay Output
If tbA = y, the buzzer and the relay are silenced by
pressing any key.
If tbA = n, only the buzzer is silenced while the
alarm relay is ON until the alarm condition recovers.
14.2.Alarm Recovery
Probe alarms P1, P2, P3, and P4 start some sec-
onds after the fault in the related probe; they automat-
ically stop some seconds after the probe restarts
normal operation. Check connections before replac-
ing the probe.
Temperature alarms HA, LA, HA2, and LA2 au-
tomatically stop as soon as the temperature returns to
normal values.
Alarms EA and CA (with i1F = bAL) recover as
soon as the digital input is disabled.
Alarm CA (with i1F = PAL) recovers only by
switching the controller OFF and ON
.
14.3.Other Messages
Message Cause Outputs
P1 Room probe failure Compressor output
acc. to par. Con and
COF
P2 Evaporator probe
failure
Defrost end is timed
P3 Third probe failure Outputs unchanged
P4 Fourth probe failure Outputs unchanged
HA Maximum tempera-
ture alarm
Outputs unchanged
LA Minimum tempera-
ture alarm
Outputs unchanged.
HA2 Condenser high
temperature
It depends on the
Ac2 parameter
LA2 Condenser low
temperature
It depends on the
bLL parameter
dA Door open Compressor restarts
EA External alarm Output unchanged
CA Serious external
alarm (i1F = bAL)
All outputs OFF
CA Pressure switch
alarm (i1F = PAL)
All outputs OFF
Table 14-1 - Alarm Signals
Message Output
Pon Keyboard unlocked
PoF Keyboard locked
noP In programming mode:
No parameter is present in Pr1.
On the display or in dP2, dP3, dP4:
The selected probe is not enabled.
Table 14-2 - Additional Display Messages
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